Table 4 Multiple Logistic Regression Model With Survival at Hospital Discharge as the Dependent Variable.

Independent Variable^a	Odds Ratio	95% Confidence Interval	p value
Secondary Model^b
CPR duration (min)	0.94	0.92–0.95	< 0.001
Post-ROSC percutaneous coronary intervention	5.80	2.44–13.80	< 0.001
Hypotension	0.36	0.20–0.64	< 0.001
Pulmonary artery catheter in place at time of arrest	24.56	3.12–193.32	0.002
Hepatic insufficiency	0.38	0.18–0.80	0.01
Shockable rhythm	1.94	1.13–3.34	0.02
Metastatic cancer or any blood-borne malignancy	0.48	0.26–0.89	0.02
Blood pH≦7.18	0.61	0.38–0.98	0.04
SB use	0.70	0.44–1.12	0.14
Secondary Model With Interaction Terms^c
CPR duration (min)	0.94	0.92–0.95	< 0.001
Post-ROSC percutaneous coronary intervention	5.16	2.15–12.39	< 0.001
Hypotension	0.37	0.21–0.67	0.001
Metastatic cancer or any blood-borne malignancy	0.44	0.24–0.81	0.003
Shockable rhythm	1.98	1.15–3.40	0.005
Pulmonary artery catheter in place at time of arrest	26.50	3.34–210.17	0.009
Hepatic insufficiency	0.40	0.19–0.83	0.009
Non-SB use × blood pH > 7.18	1.82	1.12–2.95	0.02
Favourable neurological status 24 h before cardiac arrest	1.56	1.01–2.41	0.05

Abbreviations: CPR, cardiopulmonary resuscitation; ROSC, return of spontaneous circulation; SB, sodium bicarbonate.
^aThe display of independent variables is arranged in order of p value.
^bSecondary model: goodness-of-fit assessment: n = 1060, adjusted generalised R² = 0.34,estimated area under the receiver operating characteristic curve = 0.85, and Hosmer and Lemeshow goodness-of-fit Chi-Squared test p = 0.10.
^cSecondary model with interaction terms: goodness-of-fit assessment: n = 1060, adjusted generalised R² = 0.36, estimated area under the receiver operating characteristic curve = 0.85, and Hosmer and Lemeshow goodness-of-fit Chi-Squared test p = 0.18.

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